Often with new plants, the leaves can differ in colour, this is completely normal as the growing sites may vary. For example, a plant that is grown in a windier spot may exhibit different foliage colour to that of a plant grown in a more sheltered location. Soil type can also have an impact on the colour of the leaves due to the nutrients that are available. With some species of hedging plants, the young foliage displays a brighter colour, however, as the plants mature this will even out.
Once your plants are in position they will be exposed to the same environmental conditions resulting in more consistently coloured leaves.